Vegan, Nut and Gluten-free Cinnamon-Spiced Chocolate Chunk Banana Muffins I think these Cinnamon-Spiced Chocolate Chunk Banana Muffins have to be the most challenging recipe I have ever made. I thought that those Flourless Oatmeal Cookie Carmelita Bars were, but I was wrong, very very wrong. These muffins are free of the top 8 most common allergens: